Characterization of Serratia entomophila bacteriophages and the phage-resistant mutant strain BC4B

Article Abstract:

The enterobacteria Serratia entomophila strain BC4B strain contains phi-B prophages but no phi-9A phages. The A1MO2 strain is the parental strain of BC4B and contains both the phi-9A and phi-9B prophages. The prophages are temperature sensitive, UV inducible, and are released spontaneously. All the S. entomophila strains, except phi-CW3, contain homologous pac areas, but single phi-9A and phi-9B lysogens are not homoimmune to other S. entomophila phages. BC4B is phage resistant as the phages are unable to adsorb into the bacterial cells.

Enterobacteriaceae

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Significance of bacteriophages for controlling bacterioplankton growth in a mesotrophic lake

Article Abstract:

Transmission electron microscopy helps determine the fraction of bacteria with mature intracellular phage particles and the number of free viruses in a mesotrophic lake. A comparative study between phage-induced mortality and bacterial growth rates reveals that phage-induced mortality accounts for only 20% of total bacterial mortality. Phage infection plays a significant role in structuring the bacterial host assemblage. Increase in the phage production rate accompanies phage decay.

Evaluation, Host-bacteria relationships, Plankton populations

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Antibiotic production by a Roseobacter Clade-Affiliated species from the German Wadden sea and its antagonistic effects on indigenous isolates

Article Abstract:

The antibiotic production and the antagonistic effects on the indigenous isolates by a Roseobacter Clade-affiliated species obtained from the German Wadden sea, is studied. During complete growth phase antibiotic production was displayed.

Science & research, Antibiotics, Risk factors, Bacteria

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